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Cornerstone · Grades 3–5 Keystones #1 18 October 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 18 October 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄7 + 1⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x - 8 = 34

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 12cm

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Divide 196 in the ratio 1:3:3

    Answer: 28, 84 and 84
  5. 5. Statistics Mean

    Find the mean of: 2, 11, 15, 17

    Answer: 11.25

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